header{
    justify-content: space-around;
    color: #9A9A9A;
    font-size: 20px;
    width: 100%;
    line-height: 60px;
    border-bottom: 1px solid  rgba(221, 221, 221, 100);
    text-align: center;
    span{
        width: 85px ;
        margin-bottom: 1px;
    }
    span:hover{
        border-bottom: 1px solid #4294FF ;
        color: rgba(66, 148, 255, 100);
    }
    
}

main{
    overflow: scroll;
    padding: 10px 10px 0px 10px;
}
// 最新课程
.newClass>span{
    color: rgba(16, 16, 16, 100);
    font-size: 18px;
}
.newClass-box{
    width: 100%;
    height: 150px;
    border-radius: 20px;
    // border: 1px solid #000000 40%;
    box-shadow: darkgrey 0px 0px 5px 1px;
    b{
      width: 100%;
      height: 100px; 
      background-image: url(../imgs/course-img04.jpg);
      background-repeat: no-repeat;
      background-size: 100%;
      border-radius: 20px 20px 0 0;
      display: inline-block;
     }
    
}
.newClass-box p:nth-of-type(1){
    color: rgba(16, 16, 16, 100);
    font-size: 16px;
}
.newClass-box p:nth-of-type(2){
    color: rgba(154, 154, 154, 100);
    font-size: 12px;
}

//课程
.course>h2{
    color: rgba(16, 16, 16, 100);
    font-size: 18px;
    font-weight: normal;
}